private void ReadGrammer(String filePath, String classCodePath)
{
Non_TerminalSymbolCount = -1;
Symbol2Code = new Dictionary <string, int>();
Code2Symbol = new Dictionary <int, string>();
try
{
FileStream fs = new FileStream(classCodePath, FileMode.Open);
StreamReader rs = new StreamReader(fs);
while (!rs.EndOfStream)
{
String[] line = rs.ReadLine().Split(' ');
int code = Int32.Parse(line[1]);
Symbol2Code.Add(line[0], code);
Code2Symbol.Add(code, line[0]);
}
rs.Close();
fs.Close();
}
catch (Exception e) { throw e; }
//读文法并转化
grammerMap = new Dictionary <int, GrammerItem>();
try
{
FileStream fs = new FileStream(filePath, FileMode.Open);
StreamReader rs = new StreamReader(fs);
while (!rs.EndOfStream)
{
String[] line = rs.ReadLine().Split(' ');
int from = 0;
List <int> to = new List <int>();
for (int i = 0; i < line.Length; i++)
{
if (i == 0)
{
from = GetSymbolCode(line[i]);
}
else
{
to.Add(GetSymbolCode(line[i]));
}
}
if (!grammerMap.ContainsKey(from))
{
grammerMap[from] = new GrammerItem(from);
}
grammerMap[from].AddTo(to.ToArray());
}
rs.Close();
fs.Close();
}
catch (Exception e) { Console.WriteLine(e); }
}
HashSet <int> MakeFirst(GrammerItem now)
{
if (now.firstSet != null)
{
//Console.WriteLine("First递归"+Code2Symbol[now.GetFrom()]);
return(now.firstSet);
}
now.firstSet = new HashSet <int>();
foreach (var edge in now.edges)
{
now.firstSet.UnionWith(GetFirst(edge.to));
}
return(now.firstSet);
}
